Regretfully this isn’t a feature offered by X. It could be possible with custom development, but this would be outside the scope of support we can offer. You may wish to consult a developer to assist you with this. X is quite extensible with child themes, so there are plenty of possibilities.
What I can advise is the ConvertPlus extension, it has a feature to pop-up a form when a certain button is a press.
Thanks for understanding.